High-resolution pollen record from core KW31, Gulf of Guinea, documents of the history of the lowland forests of West Equatorial Africa since 40,000 yr ago
Africa ; Atlantic Ocean ; Biodiversity ; Forest ; Marine sediment ; Palaeo-environment ; Palynology ; Pollen diagram ; Quaternary ; Stratigraphy ; West Africa
The aims of this paper are to present a new pollen record from the eastern Equatorial Atlantic and to synthesize pollen data from the adjacent continent in order to contribute to the debate on the evolution of the West African forest ecosystems
Gold mass balance in lateritic profiles from savanna and rain forest zones
French Guiana ; Geochemistry ; Gold ; Laterite ; Mali ; Mineralization ; Palaeoclimate ; Pedogenesis ; Savanna ; Tropical rain forest ; Tropical zone ; Weathering
In this paper, the gold behavior in laterites was compared under a tropical contrasted climate in Banankoro, South Mali, and under an equatorial climate in Yaou, French Guiana. Gold distribution was studied in detail in terms of pedologic horizons
Assam ; Equatorialforest ; Forest ; Image analysis ; India ; Land use ; Nature reserve ; Rural landscape ; Vegetation dynamics
The study assesses land-use change in the Nameri Tiger Reserve in Assam, using Landsat imageries. Dense forests decreased sharply while open forest increased marginally. The increases in the degraded and open forest categories occurred
at the expense of dense forests, which decreased. The number of patches in the NTR landscape recorded a fivefold increase indicating a high degree of fragmentation of the habitat. Both class and patch level changes corroborate the trend of fragmentation
Late Holocene climatic changes in western equatorial Africa inferred from pollen from Lake Sinnda, southern Congo
. is indicated by an abrupt decrease in forest pollen and by a corresponding increase in grassland pollen. Concurrent drying up of the lake shows that climate, in particular aridity, was the major cause of this change. The aridity predates agriculture marked